- Draw a line diagram of a national grid system showing typical voltages at each stage.(Solved)
Draw a line diagram of a national grid system showing typical voltages at each stage.
Date posted: September 18, 2019. Answers (1)
- Give three reasons why a verification of polarity test is carried out in a completed domestic installation.(Solved)
Give three reasons why a verification of polarity test is carried out in a completed domestic installation.
Date posted: September 18, 2019. Answers (1)
- List three metal parts that are exempted from earthing in a domestic installation.(Solved)
List three metal parts that are exempted from earthing in a domestic installation.
Date posted: September 18, 2019. Answers (1)
- Figure 5 shows an RLC circuit.(Solved)
Figure 5 shows an RLC circuit.
Calculate the:
i. Inductive reactance
ii. Capacitive reactance
iii. Circuit impedance
iv. Circuit current
v. Power dissipated in the circuit
Date posted: September 18, 2019. Answers (1)
- State the phase relationship between current and voltage in circuits that are purely:
i. Resistive
ii. Inductive
(Solved)
State the phase relationship between current and voltage in circuits that are purely:
i. Resistive
ii. Inductive
Date posted: September 18, 2019. Answers (1)
- A5000/500V, 10KVA ideal single phase transformer has 40 turns on the secondary. Calculate:
I. primary turns
II. primary full load current
III. secondary full load current(Solved)
A5000/500V, 10KVA ideal single phase transformer has 40 turns on the secondary. Calculate:
I. primary turns
II. primary full load current
III. secondary full load current
Date posted: September 18, 2019. Answers (1)
- Outline three assumptions made in order to consider a transformer as an ideal machine.(Solved)
Outline three assumptions made in order to consider a transformer as an ideal machine.
Date posted: September 18, 2019. Answers (1)
- State three advantages of toroidal type transformer over shell type transformer.(Solved)
State three advantages of toroidal type transformer over shell type transformer.
Date posted: September 18, 2019. Answers (1)
- Figure 4 below shows a block drawn in isometric projection.(Solved)
Figure 4 below shows a block drawn in isometric projection.
Figure 4
Using first angle orthographic projection, draw the following views full size
a) Front elevation in the direction of arrow F
b) End elevation in the direction of arrow E
c) Plan
Date posted: September 18, 2019. Answers (1)
- Name the logic gate shown in figure 3 below(Solved)
Name the logic gate shown in figure 3 below.
Figure 3
Name.............
Date posted: September 18, 2019. Answers (1)
- Figure 2 shows a resistor network.(Solved)
Figure 2 shows a resistor network.
Figure 2
Find value of current I
Date posted: September 18, 2019. Answers (1)
- Determine the resistance of each of the following carbon resistors if their colour code is:
i. Blue Orange Brown Silver
ii. Grey Red Yellow(Solved)
Determine the resistance of each of the following carbon resistors if their colour code is:
i. Blue Orange Brown Silver
ii. Grey Red Yellow
Date posted: September 18, 2019. Answers (1)
- State two factors that determine inductance of a coil.(Solved)
State two factors that determine inductance of a coil.
Date posted: September 18, 2019. Answers (1)
- Name two types of inductor cores.(Solved)
Name two types of inductor cores.
Date posted: September 18, 2019. Answers (1)
- Describe three characteristics of magnetic lines of force.(Solved)
Describe three characteristics of magnetic lines of force.
Date posted: September 18, 2019. Answers (1)
- List four layout tools used in metal fabrication.(Solved)
List four layout tools used in metal fabrication.
Date posted: September 18, 2019. Answers (1)
- Name the materials used to make the following parts of ac machine in Table 1 and in each case state one reason why the material...(Solved)
Name the materials used to make the following parts of ac machine in Table 1 and in each case state one reason why the material is used.
b) State three factors to consider when choosing motor for a particular installation.
Date posted: September 18, 2019. Answers (1)
- Sketch and label the schematic diagram of a dc shunt motor connected to a supply.(Solved)
Sketch and label the schematic diagram of a dc shunt motor connected to a supply.
Date posted: September 18, 2019. Answers (1)
- Three capacitors are connected as shown in Figure 1.(Solved)
Three capacitors are connected as shown in Figure 1.
Figure 1
Calculate:
i. The equivalent capacitance
ii. Charge stored in the 26μF capacitor
Date posted: September 18, 2019. Answers (1)
- After installing new cells in a 2 cell torch it failed to light when switched on. State two possible causes for the failure.(Solved)
After installing new cells in a 2 cell torch it failed to light when switched on. State two possible causes for the failure.
Date posted: September 18, 2019. Answers (1)